How Automotive Suspension Systems Work

Here's the basics on how the two main types of automotive suspensions work - Double Wishbone and MacPherson.

The purpose of a car's suspension is to support the weight of a vehicle, keep good tire contact with the ground and absorb any impacts when driving over road imperfections.

Modern suspension systems make use of various geometry to handle this task, each with its own pros and cons. In this video, the suspension from a MacPherson strut vehicle is described, taken apart part by part and explained. It is then compared to the suspension of a car with double wishbone suspension.

At the end of the video, a live comparison is presented between the two suspension types as the vehicles drive down the road.

The main components of a suspension are the control arms, strut (or spring and shock absorber), ball joints, and steering knuckles. The arrangement of these components form various geometrical relationships which can be categories and related to wheel motion as a vehicle navigates a corner or rides over a road imperfection.

The vehicles demonstrated in this video are a 2001 Toyota Corolla a 2007 Lexus GS350, and a 2004 Toyota Camry.

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